Saw-swage.



" A. E. WHITE.

SAW SWAGE. APPLICATION FILED NOV. 4, 1908.

Patented Mar. 26, 1912.

2 SHEETS-SHEET 1. I

A. E. WHITE.

SAW SWAGE.

APPLICATION FILED NOV. 4, 1008.

Patented Mar. 26, 1912.

2 SHEETS-SHEET 2.

UNITED STATES PATEN T OFFICE.

ALBERT n. wm'rn, or nan canine, WiSCONSIN.

saw-swnen.

Specification of Letters Patent. Patented Mar. 26, 1912.

Application filed November 4, 1908.

Serial No. 461,055.

April 3rd, 1906, for an improvement in saw swages.

My invention consists generally in various constructions andcombinations, all as here inafter described and particularly pointed outin the claims.

In the accompanying drawings forming part of this specification, Figure1 is a sectional view illustrating the application of my improved sawswage to the teeth of a saw, Fig. 2, is a transverse sectional view,

Fig. 3, is a side elevation, Fig. 4, is a bottom view, Fig. 5, is adetailed view illustrating the manner of mounting the anvil anddie inthe swage block.

In the drawing, 2 represents a saw having teeth 3 to be swaged.

4 is a band semi-circular in form and supporting a cylindrical head orblock 5..

the shape of the teeth upon which the tool is working. Block 5 isprovided with a centrally arranged slot 8 to receive the saw teeth and adie 9 is mounted in said block transversely with respect to the slot 8and is capable of adjustment to present new surfaces to the work. Theworking face of the die is of the same formv throughout its length. Alever 10 has a forked end comprising arms 11 which have split hubs 12 inwhich the die is securely held by means of the clamping screws 13, Thehubs bear on the ends of theblock 5 and prevent longitudinal movement ofthe die when the tool is in use, but upon loosening the set screws 13,

, the die may be movedlengthwise in the hubs to present a new or adifferent shape to the saw teeth. The opening in the block in which thedie is placed is of cylindrical. form and the die fits said opening fora portion of its circumference.

The wall of the opening in the block therefore forms a bearing surfaceon which the die turns. The die is preferably made of a straight pieceof steel of cylindrical form, cut away or flattened at one side so as toform two working edges extending lengthwise of the die from end to endthereof. The flattened surface is preferably formed on the arc of acircle, so that the surface of the die consists of two partialcylinders, one of greater radius than the other, and having their axeseccentric with respect to each other. This gives the die, in crosssection, the form shown in Figs. 3 and 5 of the drawings, theintersecting lines of said cylinders extending, upon opposite sides ofthe die, lengthwise thereof and forming straight working edges extendingfrom one end of the die to the other. When the die is in position in theblock its outer surface fits the opening in the block for a portion ofits circumference, and a space is left between the wall of the openingin the block and the flattened face of the die as shown in Fig. 5. Thedie may be formed in any suitable manner. It may be made from a piece ofround steel by milling off one side thereof so as to give itsubstantially the form shown in Figs. 3 and 5 of the drawings. In thiscase the milled surface is preferably cut on the arc of a circle ofgreater radius than the radius of the bar itself. The die may however beformed in any other manner, as by rolling rods to the desired shape andafterward cutting them up to the lengths desired for the dies. Inoperation the die rocks back and forth in its bearing, and the pressurethereon being in one direction and away from the side which has beenmilled or otherwise flattened it is not necessary to have the die fitthe opening on that side. The working points of the die are on the linesrunning lengthwise thereof where the curved surfaces intersect eachother, and there being two of these lines, one on each side of thecenter of the die, two working edges are provided extending the fulllength of the die. As the die becomes worn it can be adjustedlengthwise-in the block, in either direction, thereby permitting the useof the working edges nearly to both ends of the die, it being necessaryonly to have an end of the die grasped by the edge of the split hub onthe fork of the handle with sufficient firmness to insure the turning ofthe die. After one edge of the die has been used for its full length thedie may be removed and turned end for end, and the other working edgemay then be used in a similar manner for its full length.

The lever 10 is in line with the slot in the mounted in the path of thelever 10. A

screw 17 is mounted in one side of the head and has a square end that isengaged by a locking plate 18 and a screw 19 is provided in the oppositeside of the head and has a lever 20 by means of which it is moved upagainst the tooth to be swaged, the screw 17 having been previouslyadjusted, to project into the slot 8 in the head and engage one side ofthe tooth. In the upper part of the head 5, a socket 21 is formedwherein an anvil 22 is arranged. The socket 21 communicates with theslot 8 and the lower end of the anvil is adapted to form a bearingsurface for the tooth during the swaging operation. The anvil is held inplace by means of screws 23 which engage the sides of the anvil and ascrew 24 fitting into the socket 21 contacts with the outer end of theanvil and prevents outward movement thereof when. the tool is in use.Whenever desired, the anvil may be reversed to present a fresh surfaceto the tooth.

The frame 1 has slots 25 extending longitudinally therein and a bracket26 has a vertical slot 27 to receive a bolt 28 which when loosenedallows vertical adjustment of the bracket thereon or horizontaladjustment in the slot 25. A shank 29 is vertically slidable in thebracket 26 and is provided with nuts 30 and a spring 31 which yield--ingly resists upward movement of the shank. The lock nuts 30 are capableof adjustment for the purpose of regulating the tension of the springand controlling the movement of the shank. A plate 32 is centrallypivoted on the lower end of the shank 29 and has flanges 33 dependingupon each side of the teeth 3. The opposite end of the frame has a slot3 1 and a plate 35 which bears on the teeth of the saw and has an arm 36with a slot 37 therein through which a bolt 38 passes and adjustablysecures the plate to the frame. A similar mechanism is shown in mypatent above referred to.

In saw swages as heretofore constructed the die, when made with morethan one working edge, had such working edges in the central portionthereof and extending for only a short length; providing only one or twoworking points on each edge. When made with working edge the fulllength, they were so formed as to leave only one line of working points.In either of these constructions the dies are necessarily short lived,and the form used requires careful and accurate machine work, in orderto finish the surface of same. The die of my present invention is astraight steel bar, of uniform cross section at all points throughoutits length, and with two working edges, similar to each other, extendingin straight lines, on opposite sides of the center, and for the fulllength of the die. This construction not only provides a superior die,with at least twice the wearing life of any swage die heretofore used,but one that is cheaply produced and easily held by the operating lever.The shape is such as to permit ofsteel being drawn to exact form anddoes not require any machine work to finish same.

I have illustrated this invention for use in. connection with a band"saw, but it is adapted for swaging the teeth of gang and circular sawsof all types as well as band saws.

I claim as my invention 1. In a saw swage, the combination with a blockor head having-a slot to receive the saw teeth, of a die mounted in saidhead and adjustable lengthwise therein across said slot, said dieconsisting of a straight bar, of uniform shape in cross sectionthroughout its length, with its outer surface formed of two partialcylinders eccentrically arranged in relation to each other, andintersecting on straight lines, the lines of intersection formingworking edges extending from end to end of the die on each side of thecenter thereof, said die-being reversible end for end to bring eitheredge into working position, and means for operating said die.

2. In a saw'swage, the combination with a block or head having a slot toreceive the saw teeth, of a die mounted in said head and adjustablelengthwise therein across said slot, said die consisting of a straightbar of uniform shape-in cross section throughout its length, a portionof its outer surface being formed of a partial cylinder, with a workingedge, on each side of the center, extending from end to end of the die,said die being reversible, end for end, to bring either working edgeinto operating position, and means for operating said die.

3. In a saw swage, a block or head having a slot to receive the sawteeth, a die mounted in said head and adjustable therein across saidslot, one side of said die being milled off to a true radius and theother side of Said die forming a bearin surface in the block, themeetingpoints of said milled surface and said bearing surface forminglike working edges extending from end to end of the die on each side ofthe center thereof, whereby said die is adapted to be removed from saidhead when one side is worn and turned end for end to bring the otherside into working position, an operating lever having a forked end, thearms of said fork ha vin split hubs thereon to receive said die, and campin screws for securin said hubs on said die, t e inner ends of saihubs contacting with said head and holding said die against longitudinalmovement during the swaging operation.

4. In a saw swage, the combination with a block or head having a slot toreceive the saw teeth, of a die mounted in said head and adjustablelengthwise therein across said slot, said die consisting of a strai htbar of uniform shape in cross section tiroughout its length, with aworking edge on each side of the center, both of said working ed esbeing alike and said die being reversib e, end for end to bring eitherworking edge into operating position, and means for operating said die.

5. In a saw swage, the combination with a block or head having a slot toreceive the saw teeth, of a die mounted in said head and adjustablelengthwise therein across said slot, said die consisting of a strai htbar of uniform shape in cross section t roughout its length, with aportion of its surface formed of a partial cylinder, and the remainingortion flattened, whereby a worle ing edge 1s provided on each side ofthe center of the die extending from end to end thereof, both of saidworking edges being alike and said die being reversible to bring eitherworking edge into operating position, and means for operatin said die.

6. In a saw swage, t e combination with the cylindrical head or block 5having a transverse opening to receive a die and a slot 8 at rightangles to the die opening to receive the saw teeth, of a frame providedwith a band 4 engaging and supporting the block at one side only of thesaid slot 8, said frame being provided at its end with the horizontalslots 25 and 34 and with the arched bar 14 having the slot 15, a plate35 pivotally and adjustably mounted on the side of frame and in the slot34, a bracket 26 mounted on one side of frame and in the slot 25, meansfor vertically and horizontally adjusting said bracket, a shank 29yieldingly mounted in said bracket 26, and the plate 32 pivoted on thelower end of the shank 29, substantially as described.

7. In a saw swage, the combination with a head or blockhaving atransverse die receiving opening and a slot. to receive the saw teeth,of a frame provided with a band enaging and supporting said block, saidframe being provided at one end with a pivoted plate 35 and at its otherend with a horizontal slot 25, a bracket 26 provided with a verticalslot 27, a bolt 28 passing through the slot 27 and through said slot 25,where liy the bracket 26 is capable of vertical and ori- -zontaladjustment, the shank 29 mounted in said bracket and provided withadjustable nuts 30, a spring 31 yieldingly engaging said shank 29 and aplate 32 pivoted on the lower end of said shank, substantially asdescribed.

In witness whereof, I have hereunto set my hand this nineteenth day ofOctober, 1908.

ALBERT E. WHITE.

Witnesses:

HERMAN STOCKHAUSEN, J r., F. C. BARLOW.

Copies of this patent may be obtained for iive cents each, by addressingthe Commissioner of Patents,

Washington, D, G."

